FORMALIN (as FORMALDEHYDE)‡

Chemical Identification
CAS # 50-00-0
Formula
 

CH₂O

Synonyms
 
 

formic aldehyde; lysoform; methanal; oxomethane; oxymethylene solution; paraform; formaldehyde (solution)

Physical Properties
Physical description Nearly colorless gas with a pungent, suffocating odor.
Boiling point 214°F Molecular weight varies
Freezing point/melting point -134°F Vapor pressure 1 mmHg
Flash point 185°F Vapor density 1.04
Specific gravity Ionization potential 10.88 eV
Lower explosive limit (LEL) 7% Upper explosive limit (UEL) 73%
NFPA health rating 3 NFPA fire rating 2
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time*
 
 

 

Sampling volume (TWA)*
 
 

 

Sampling flow rate (TWA)*
 
 

 

Sampling volume (STEL/Peak/C)*
 
 

 

Sampling flow rate (STEL/Peak/C)*
 
 

 

Analytical method instruments
Method reference
Notes

See FORMALDEHYDE. Do NOT use passive monitors to sample for formalin.

Special requirements
 
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Sampler/Sampling media
 
 

 

Bulk Method
Bulk Method
 
 

 

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 
 

0.75 ppm [0.5 ppm Action Level]

REL-TWA
 
 

0.016 ppm

TLV-TWA
 
 

0.1 ppm [2016]

PEL-TWA
 
 

0.75 ppm [0.50 ppm Action Level]

PEL-STEL
 
 

2 ppm

REL-STEL
 
 

 

TLV-STEL
 
 

0.3 ppm [2016]

PEL-STEL
 
 

2 ppm

PEL-C
 
 

 

REL-C
 
 

0.1 ppm [15 minutes]

TLV-C
 
 

 

PEL-C
 
 

 

Skin notation
 
 

N

Skin notation
 
 

N

Skin notation
 
 

N

Skin notation
 
 

N

Notes:
 
 

See 29 CFR 1910.1048, Formaldehyde.

Notes:
 
 

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens.

Notes:
 
 

respiratory sensitizer (RSEN), dermal sensitizer (DSEN)

Notes:
 
 

See California Code of Regulations; Title 8, §5217. Formaldehyde.

Health factors:  See NIH-NLM PubChem. IDLH
 
 

20 ppm

Carcinogenic classifications: IARC-1, NIOSH-Ca, NTP-R, OSHA-Ca, TLV-A1, EPA-B1 Notes:
 
 

Ca

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 
 

1 ppm/10 ppm/40 ppm

Last Updated Date : 12/29/2020